package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

public class RefreshTokenInterceptor implements HandlerInterceptor {


    private StringRedisTemplate stringRedisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate){
        this.stringRedisTemplate=stringRedisTemplate;
    }
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //HttpSession session = request.getSession();
        //获取请求头token
        String token = request.getHeader("authorization");

        System.out.println("authorization :" + token);

        if(StrUtil.isBlank(token)) {
           //放行到第二个拦截器
            return true;
        }
        //基于token获取redis中的用户
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(RedisConstants.LOGIN_USER_KEY + token);

        if(userMap.isEmpty()) {
            //放行到第二个拦截器
            return true;
        }

        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);

        UserHolder.saveUser((UserDTO) userDTO);
        //刷新token有效期
        stringRedisTemplate.expire(RedisConstants.LOGIN_USER_KEY+token,RedisConstants.LOGIN_USER_TTL, TimeUnit.SECONDS);


        return HandlerInterceptor.super.preHandle(request, response, handler);
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.removeUser();
    }
}
